I'm just seeing this. You have confused me even more. Pre amps? Tubes? Does it work on ps4? I'm thinking about upgrading but I heard that the ps5 will have 3d audio. I don't mind spending money but I'm not sure if this would be a waste.
I'm speculating the PS5 will have 3D audio processing at the software level. I believe things like mixamps will still work via USB. Since the surround audio will be processed by the console, there will not be a need for optical out. -That's just my theory. I really hope they still include an optical out.
If 3D audio is processed at the console and can be sent via USB, it means headsets that are only stereo on PS4 will effectively be surround on PS5. For instance, the Logitech G533 headset I own. Great surround PC headset, but on PS4 is stereo only (PS4 is stereo only via USB), and I just can't do stereo only for gaming.
I've read the PS5 full detail is possibly coming early June. I hope we'll know more by then.